﻿using System.Collections.Generic;
using System.Linq;

// ReSharper disable once CheckNamespace
namespace Cosmos.Security.Verification
{
    public class PearsonConfig
    {
        private static readonly IReadOnlyList<byte> _table = new byte[]
        {
            98, 6, 85, 150, 36, 23, 112, 164, 135, 207, 169, 5, 26, 64, 165, 219, //  1
            61, 20, 68, 89, 130, 63, 52, 102, 24, 229, 132, 245, 80, 216, 195, 115, //  2
            90, 168, 156, 203, 177, 120, 2, 190, 188, 7, 100, 185, 174, 243, 162, 10, //  3
            237, 18, 253, 225, 8, 208, 172, 244, 255, 126, 101, 79, 145, 235, 228, 121, //  4
            123, 251, 67, 250, 161, 0, 107, 97, 241, 111, 181, 82, 249, 33, 69, 55, //  5
            59, 153, 29, 9, 213, 167, 84, 93, 30, 46, 94, 75, 151, 114, 73, 222, //  6
            197, 96, 210, 45, 16, 227, 248, 202, 51, 152, 252, 125, 81, 206, 215, 186, //  7
            39, 158, 178, 187, 131, 136, 1, 49, 50, 17, 141, 91, 47, 129, 60, 99, //  8
            154, 35, 86, 171, 105, 34, 38, 200, 147, 58, 77, 118, 173, 246, 76, 254, //  9
            133, 232, 196, 144, 198, 124, 53, 4, 108, 74, 223, 234, 134, 230, 157, 139, // 10
            189, 205, 199, 128, 176, 19, 211, 236, 127, 192, 231, 70, 233, 88, 146, 44, // 11
            183, 201, 22, 83, 13, 214, 116, 109, 159, 32, 95, 226, 140, 220, 57, 12, // 12
            221, 31, 209, 182, 143, 92, 149, 184, 148, 62, 113, 65, 37, 27, 106, 166, // 13
            3, 14, 204, 72, 21, 41, 56, 66, 28, 193, 40, 217, 25, 54, 179, 117, // 14
            238, 87, 240, 155, 180, 170, 242, 212, 191, 163, 78, 218, 137, 194, 175, 110, // 15
            43, 119, 224, 71, 122, 142, 42, 160, 104, 48, 247, 103, 15, 11, 138, 239 // 16
        };

        public IReadOnlyList<byte> Table { get; set; }

        public int HashSizeInBits { get; set; } = 8;

        public static PearsonConfig Default { get; } = new()
        {
            Table = _table,
            HashSizeInBits = 8
        };

        public PearsonConfig Clone() => new()
        {
            Table = Table?.ToArray(),
            HashSizeInBits = HashSizeInBits
        };
    }
}